Furnace Replacement I need to replace my a/c unit. The service person is telling me it is best to replace the furnace at the same time. Is this really necessary? Vivian Tom’s Answer: Your browser does not support the audio element. Got a question? Click here to ask Tom https://media.blubrry.com/homeshow/p/homeshowradio.com/wp-content/uploads/2011/04/Vivian.mp3Podcast: Play in new windowMore HomeShow Videos:What's That HVAC Smell?Old breaker box replacementWhat is that smell when I turn my furnace on for the…How long should I expect my furnace and AC system to last?What's your advice on do-it-yourself water softener…